Hi Holger, Peter,
I was investigating the possibility to upgrade SPIN-API 1.2.0 to depend
on Jena 2.7.2. And wanted to share my results. Holger, are you
interested in working more publicly on the spin opensource part?
(Copyright assignments are possibility etc...) and if so how would you
like to proceed?
First thing is that there are very few changes between Jena 2.6.4 and
Jena 2.7. I took the feature/jena27upgrade branch from Peter on github
as a starting point. I had a few issues.
Template Group
The first is the Template group that peter talked about. Which breaks
one test case in my project. One where I validate that the SKOS
constraints really work.
* or {*} property paths
The second is the changing of com.hp.hpl.jena.sparql.path.P_OneOrMore
into com.hp.hpl.jena.sparql.path.P_OneOrMore1 or
com.hp.hpl.jena.sparql.path.P_OneOrMoreN.
For now I changed these into com.hp.hpl.jena.sparql.path.P_OneOrMore1.
This allows all spin test cases to pass. And also allows 358 of my codes
unit test to pass.Jena's serious lack of java doc in these areas means I
am not sure what the difference between these options are. Except that
the PathWriter translates P_OneOrMore1 as * and P_OneOrMoreN as {*}. The
{*} does not seem to be allowed by the 05 January 2012 Sparql 1.1 draft.
So the version I picked should be correct.
VALUES from LC 2
The thirds is the addition of an ElementData i.e. the current
proposed VALUES keyword. But I have no instance of that in my queries as
this is a last call 2 feauture. The spinrdf serialization format should
be extended for this case. It would simplefy some of my constraint queries.
Non SPIN problems
The main change I had to do in my queries was simple.
I had used the following.
SELECT * WHERE {?this a :something} GROUP BY ?this
These where are longer allowed but are easily fixed by changing them.
SELECT ?this WHERE {?this a :something} GROUP BY ?this
The repo having this code is on
https://github.com/JervenBolleman/spin/tree/feature/jena27upgrade
I will try to flesh out the ElementData values code. But Holger/Topbraid
devs could you discuss how you would like to collaborate.
Regards,
Jerven
On 01/26/2012 12:13 AM, Holger Knublauch wrote:
Hi Peter,
sorry but you are way ahead of me here. We will look into Jena 2.7 migration
after 3.6 (which is currently our focus to get out of the door)
Regards,
Holger
On Jan 24, 2012, at 3:19 PM, Peter Ansell wrote:
Hi,
I am wanting to upgrade my spin-api fork to use jena-2.7.0-incubating
that was released recently so that I can start using jena-2.7.0 in
other linked projects, but I am having a few issues.
SPIN-API currently relies on
com.hp.hpl.jena.sparql.syntax.TemplateGroup and
com.hp.hpl.jena.sparql.syntax.TemplateVisitor that were removed in
jena-2.6.5 and hence they are not available in 2.7.0.
In order to fix the TemplateVisitor issue I removed
AbstractTemplateVisitor. This removal may have caused a sideeffect in
SPINConstraints.convertAskToConstruct where I had to remove the
reference to TemplateGroup and replace it with something. Naively I
replaced it with a call to getConstructTemplate but that appears to be
null in at least some cases, so two of the tests are now failing. I
don't have a comprehensive test suite for SPIN so it is difficult to
say what the solution might be. In addition, looking at the test using
a debugger doesn't appear to show anything interesting.
The Git branch that I have been working on is:
https://github.com/ansell/spin/tree/feature/jena27upgrade
Thanks,
Peter
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